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Halloween is a time for dressing up in every type of costume imaginable. Many of these involve blood as an integral part of the look and feel of the costume. Though fake blood is widely available at many stores, making fake blood for Halloween is simple and cheaper when you do it from home.
Balancing Color and Thickness
Blood can be a hard to duplicate and make take some trial and error to get the right consistency and colour. Color can be changed by adding more or less blue or red food colouring. However, consistency will depend on what the application is for. If you are looking for blood that is going to stay on the face without looking dry or crusty, you will need to use more thickener. If you want dry and crusty, or blood that runs well on the face, you will need to use more water.
Fake blood is made from four main ingredients. These are corn syrup, water, food dye and a thickener. Thickeners can be wet or dry. Dry thickeners include flour or cornstarch. Wet thickeners are products such as laundry detergent or chocolate syrup.
Colouring is an important aspect of making blood. Red food colouring is the obvious choice for getting the colour needed for blood. However, straight red food colouring will not look realistic. Try adding chocolate syrup and blue food colouring to get a darker more realistic look. Be careful, too much blue or syrup could potentially cause your entire batch to become purple or brown. Add in slowly and mix thoroughly before adding any more ingredients.
If you want blood that will easily wash out of clothing, try replacing some of the corn syrup with dish washing detergent or liquid laundry soap.
The key to making great fake blood for Halloween is experimentation. There is no real recipe for how much of each ingredient you should mix together. Try different measurements of each until you get the colour and consistency that best fits your Halloween costume. If you're in a hurry without time to experiment, try this quick recipe: 1/2 cup corn syrup, 1/2 Tbsp water, 1 Tbsp red food colouring and 1/2 tsp yellow food colouring.
Mix it all together and add chocolate syrup if the colour of the blood is too bright.